UK Manufactured Unvented Hot Water Cylinder Installation Guide
11
Total Dissolved Solids (TDS)
Some water analysis reports may state the conductivity of the water rather than the level of total dissolved
solids. Conductivity, measured in microsiemens per centimetre (μS/cm), is directly proportional to the TDS con-
tent of the water. TDS, in mg/L, is approximately 70% of the conductivity in μS/cm.
The JOULE warranty will not cover resultant faults to the storage cylinder if this water heater is connected at
anytime to a water supply where the TDS content of the water exceeds 600 mg/L. 16 In locations where TDS
approaches 600 mg/L, e.g. due to sediment, we strongly recommend fitting an appropriate filter to ensure
water entering or in the water heater does not exceed this level at any time i.e. due to sediment build up.
Features Of The Unvented Cylinder
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Made from Duplex Stainless Steel for excellent corrosion resistance.
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Strong rust-proofed steel case.
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Insulation is by means of an approved CFC/HCFC free polyurethane foam with an ozone depletion
factor of zero.
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Available in a variety of sizes to suit - 90L, 120L, 150L, 180L, 210L, 250L and 300 litres.
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All models including Solar models are available in Twin coil versions supplied complete with all the
necessary safety and control devices needed to connect to cold water mains
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All safety and control devices are pre-set.
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High quality controls selected that combine high flow rate performance with minimum pressure drop
which gives fantastic performance in all areas, with great improvements in areas with poor water pres-
sure.
